11/11/11

The antiquities authority in Egypt closed down the pyramid of Khufu, known as Cheops, the largest pyramid in the Giza Necropolis, after rumors surfaced about groups attempting to hold spiritual ceremonies there to mark the rare 11/11/11 date.

As you’re almost surely aware, Friday’s date is November 11, 2011 — or, more commonly put, 11/11/11. And people are observing the once-in-a-century occurrence in a variety of ways.